722981424 has 80 divisors (see below), whose sum is σ = 2043512064. Its totient is φ = 218438400.

The previous prime is 722981417. The next prime is 722981429. The reversal of 722981424 is 424189227.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (722981429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 195109 + ... + 198779.

Almost surely, 2^722981424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 722981424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1021756032).

722981424 is an abundant number, since it is smaller than the sum of its proper divisors (1320530640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

722981424 is a wasteful number, since it uses less digits than its factorization.

722981424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4066 (or 4060 counting only the distinct ones).

The product of its digits is 64512, while the sum is 39.

The square root of 722981424 is about 26888.3138928420. The cubic root of 722981424 is about 897.5163722724.

The spelling of 722981424 in words is "seven hundred twenty-two million, nine hundred eighty-one thousand, four hundred twenty-four".